import 'package:flutter/material.dart';
class ColumnAndRow extends StatelessWidget {
const ColumnAndRow({ Key? key }) : super(key: key);

  @override
  Widget build(BuildContext context){
    return Container(
      width:double.infinity,
      height:double.infinity,
      color:Colors.yellow,
      child:Row(
        mainAxisAlignment: MainAxisAlignment.center,
        crossAxisAlignment: CrossAxisAlignment.center,
      children:[
        ColumnAndRowItem(),
         ColumnAndRowItem(),
          ColumnAndRowItem(),
      ]
      )
    );
  }
}
class ColumnAndRowItem extends StatelessWidget {
const ColumnAndRowItem({ Key? key }) : super(key: key);

  @override
  Widget build(BuildContext context){
    return Container(
      width:100,
      height:100,
      child:Container(
        width:double.infinity,
        height:double.infinity,
      decoration:BoxDecoration(
       borderRadius: BorderRadius.circular(50),
       color:Colors.blue,
      )
      )
    );
  }
}